How to analyze data in a DB2 by Watson Discovery Service

Hi, I need to analyze by Watson Discovery Service some data stored in a remote DB2 database. I cannot use the Data Crawler and I'm wondering to know if there is an alternative way to do that. I don't have a great experience, can you provide guidance about that? Thanks!

At the left side of this page, there are links for below topics:
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Getting started with the Discovery API
Getting started with the Discovery tooling
Configuring your service
Adding content
Using the Data Crawler
Building queries and delivering content
Query building reference
API reference
Integrating with Watson Knowledge Studio
Migrating from Alchemy Data News
Release notes
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Hi hidehy, thanks for you answer. Yes, I tried everything is in the documentation. Problem is that all examples explain how to crawl files from filesystem and I need to crawl data from DB2 databases. By reading the documentation it seems that the only option is to use the crawler but I get errors and I'm not able to use it. Then I was wondering if there is an alternative way to crawl and import into a collection data from DB2. If you have any example please let me know. Thanks!